Trimonte Jorge Mussi Airport (ICAO: SNAO) is a small general aviation airport located in Casimiro de Abreu, a municipality in the state of Rio de Janeiro, Brazil. It serves primarily private and charter flights rather than scheduled commercial airline service. The airport is a modest facility suited to light aircraft operations and plays a supporting role in regional connectivity for the surrounding area. It does not hold an IATA code, reflecting its limited commercial traffic volume.